This interactive Sankey diagram visualizes a Swagger API workflow, mapping resources and endpoints through HTTP methods to response status codes, with node colors distinguishing functional groups. Built with D3.js and the custom `d3.sankey` layout, the SVG-based chart allows drag-and-drop node repositioning that triggers `sankey.relayout()` to update link paths. The example also demonstrates dynamic data loading from JSON files, such as `TestEx-Results.json`, and includes experimental link text overlays that color-code test results based on encoded status markers.